ORIGINAL: F15driver

Bart,

Thanks for the explanation on the icon showing the hydraulic setup. in researching the Festo valve in their catalog here in the US, their picture shows the manifold with two valves facing downward like yours but no valve on the end. I gather you've added this Festo connection. Do you have a part # for it as well? Also can you show exactly how you connect the hydraulic lines to these 3 valves? Are the 4mm/3mm reducers installed just below the 2 downward pointed Festos? Sorry for all the questions but as you pointed out earlier, one needs to be in this line of business for it to make sense.

Thanks for your help.

Rob

ORIGINAL: ianober

Also where did you guys buy you HGL M5 QS-4 manifolds from? I have found plenty of data on them but no easy source to order them from.

ORIGINAL: Aussie Bart

Rob/John

UMS controller capacitor seems to be the culprit as I had suspected earlier, all of my units are at least 12 months old and have never failed but they are also fitted with the 10u 35 volt caps as standard.

The UMS valve (in my cases) really does not seem to take much power to move. I tend to use the Bluebird thin wing digital servo that is rated at 5 kgs/cm. The piano wire link I use from the servo arm to the valve spool is fitted right next to the hub of the servo horn and maybe 10 mm (1 cm) distance out from the horn screw which give a theoretical force of 5 kgs. Because the spool movement is so short, you need to keep the servo arm attachment as short as possible anyway. I like the idea of John Mac about using the retract servo, I might try that on the F14 when I fit that out.

As mentioned earlier, once you fit the Festo Pilot Check Valves your main will become rock hard, just try and remember to put some safety wire or similar on the tube where ever it goes over a barbed fitting. The reason the mains feel softer compared to the nose is the angle the cylinder sits on and therefore the force ratio it can achieve. With the Festo valves, my Mig sits on its mains for literally weeks (and has no reason to ever leak down), I actually end up with flat spots on the tires....

As for the manifold arrangement of the valve, it is already set up with the 3 ports, I also fitted 4 mm to 3 mm reducers on each port to allow the tube fit up. If you have a look at my earlier post at the top of this page there are 5 photo's (scroll across), I am not sure why but the 5th photo seems to be just an icon that you need to click on, this photo is actually the hydraulic circuit showing just how these valves are set up and work, I hope you guys can see this ok, if not let me know and I will try and post again.

Like most of you, I would be really keen to see if JL have resolved this problem although it seems that no one has any idea if the ''upgrade'' even exists. I was going to buy the SU27 and although I know how to fix the gear (it has the same setup as the Mig), in principal I won't buy it until I know they have addressed the issue because from where I sit they continue to sell aircraft with UC that is guaranteed to fail and they don't care.

I hope you all have a merry Christmas and behave yourselves, unfortunately I have to tell you that during this holiday season I will have to fly my Mig in this glorious Aussie weather on retracts that work just oh so sweet.

ORIGINAL: F15driver

Bart,

I've got my enquiry into Todd at Dreamworks re. the Festo valves and should hear from him shortly. In the meantime could you outline for me what lines go to what ports on the valve? That would be most helpful, either by description or by a drawing.

Much appreciated,
Rob
F15driver

ORIGINAL: F15driver

Heard back from Dreamworks today and they will not be a supplier for the HGL M5 QS-4 check valve due to small quantities involved. They carry everything else we need available on their website. I also have a query into Festo USA so will see if they might be a supplier in limited quantities. Has anyone else come up with a US supplier? Ian? Edgar?

Rob
F15driver

ORIGINAL: F15driver

By the way, Yang of JL fame has purportedly sent me the upgraded parts for the landing gear system. Did you catch the phrase ''upgraded''? The charge is $40 for the upgrade as he maintains the original system works just fine and these new parts are customer requested upgrades. The PR fiasco at Jet Legend continues unabated! My dealer agreed to split this cost with me so the upgrades will only cost $20. Thank you Monica
Regards,
Rob
F15driver

ORIGINAL: ianober

Those last 2 posts sounded a little contradicting. Not sure what to believe right now, have they or have they not found a fix?

John, I am still looking for an easy source for these valves. I didn't think Todd would be able to help since they are kind of a special item when it comes to the R/C world. I did find one on eBay but it did not have the 4mm push in fittings.